@article{1258138099,
author = {Ledzewicz, Urszula and Sch\"attler, Heinz and Walczak, Stanislaw},
title = {Optimal control systems governed by second-order ODEs with Dirichlet boundary data and variable parameters},
journal = {Illinois J. Math.},
volume = {47},
number = {4},
year = {2003},
pages = { 1189-1206},
language = {en},
url = {http://dml.mathdoc.fr/item/1258138099}
}
Ledzewicz, Urszula; Schättler, Heinz; Walczak, Stanislaw. Optimal control systems governed by second-order ODEs with Dirichlet boundary data and variable parameters. Illinois J. Math., Tome 47 (2003) no. 4, pp. 1189-1206. http://gdmltest.u-ga.fr/item/1258138099/